Comparison Between Different Investigation Methods of Quasi-Static and Dynamic Brake Pad Behaviour

Augsburg, Klaus; Günther, Hagen; Abendroth, Harald; Wernitz, Boris

doi:10.4271/2003-01-3340

Cited by 11 publications

(6 citation statements)

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“…The dynamic relationship between the motor angle and the clamp force is attributed mainly to the viscoelastic effects exhibited by the aluminum caliper bridge [14] and, to some degree, the brake pads [15] (see Fig. 2 for the component locations).…”

Section: Dynamic-stiffness Modelmentioning

confidence: 99%

Clamp-Force Estimation for a Brake-by-Wire System: A Sensor-Fusion Approach

Saric

Bab–Hadiashar

Hoseinnezhad

2008

IEEE Trans. Veh. Technol.

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The elimination of a clamp-force sensor from brake-by-wire system designs is strongly demanded due to implementation difficulties and cost issues. In this paper, a new method is presented to estimate the clamp force based on other sensory information. This estimator fuses the outputs of two models to optimize the root-mean-square error (RMSE) of estimation. Experimental results show that the estimator can accurately track the true clamp force for high-speed cases as demanded by the antilock braking system controls. A training strategy has been used to ensure that the estimator can successfully adapt to parameter variations associated with wear. This paper is concluded with a discussion on the reliability of the developed clamp-force estimator.

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Section: Dynamic-stiffness Modelmentioning

confidence: 99%

Clamp-Force Estimation for a Brake-by-Wire System: A Sensor-Fusion Approach

Saric

Bab–Hadiashar

Hoseinnezhad

2008

IEEE Trans. Veh. Technol.

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“…Based on this, it is determined that a relationship between motor angle and induced clamp force is of first order. This first order dynamic is attributed to viscoelastic effects exhibited mainly by the aluminium caliper bridge [8] and to some degree the brake pads [9]. To determine the parameters of such a model, a least squares approach is used as follows.…”

Section: Estimator Development Frequency Domain Identificationmentioning

confidence: 99%

Estimation of Clamp Force in Brake-by-Wire Systems: A Step-by-Step Identification Approach

Hoseinnezhad

Saric

Bab–Hadiashar

2006

SAE Technical Paper Series

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“…On one hand it is well known that friction materials exhibit nonlinear characteristics dependent on the type of loading, i.e. static, dynamic, frequency and temperature loading [4,5,6,7,8,9]. On the other hand friction material properties influence brake squeal simulation results decisively [9,10].…”

Section: Introductionmentioning

confidence: 98%

Steps towards Predictive Simulation and Faster Experimental Investigation of Automotive Brake Systems with Respect to Squeal

Hornig

Hochlenert

Gödecker

et al. 2013

SAE Int. J. Passeng. Cars - Mech. Syst.

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The development process of automotive brakes is known to be challenging and time-consuming. It is an iterative process consisting of interplay between brake squeal simulation and extensive experimental investigations of the brake system at the test rig and in the vehicle. In this context, the complex eigenvalue analysis (CEA) of linearized FE models is a part of standard development process of brake systems. Nevertheless this linear analysis has not reached the status of a predictive tool yet, remaining a tool accompanying experimental investigations of the brake system only. Possible reasons may be inadequate simplifications of frictional contact, damping effects and friction material modeling on one hand and insufficiencies of the mathematical mechanical models themselves, i.e. linear vs. nonlinear stability analyses on the other hand. The extensive experimental investigations apply time consuming standard test procedures and need efficiency improvement. This paper introduces several steps towards improvement of brake development process efficiency with respect to brake squeal and gives an overview on corresponding research at the chair of Mechatronics and Machine Dynamics at TU Berlin. First it describes the refinement of friction material parameter acquisition with respect to squeal relevant loading conditions using the DCTR (dynamic compression test rig) technology. Based on this experimental identification of dynamic friction material parameters, linear as well as nonlinear stability analyses of multibody -disk brake models are performed. Pointing out limits and potentials of the particular analysis methods, the nonlinear stability analysis explains basic phenomena known from the operating experience of brake systems. Finally an experimental method for rapid identification of squeal suspicious states is introduced. The time efficiency of this method allows a fast overview on the usefulness of constructive countermeasures to avoid squeal and might contain potentials towards efficiency improvement with respect to time consuming standardized experimental investigations.

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Comparison Between Different Investigation Methods of Quasi-Static and Dynamic Brake Pad Behaviour

Cited by 11 publications

References 0 publications

Clamp-Force Estimation for a Brake-by-Wire System: A Sensor-Fusion Approach

Clamp-Force Estimation for a Brake-by-Wire System: A Sensor-Fusion Approach

Estimation of Clamp Force in Brake-by-Wire Systems: A Step-by-Step Identification Approach

Steps towards Predictive Simulation and Faster Experimental Investigation of Automotive Brake Systems with Respect to Squeal

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